Warp stop-motion for looms



Patented oet. 25, 1921.

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WARP'STOP MOTIONFOR LOOMS.

APPLICATION FILED IuLY 16.1921.

1,394,970, Patented Oct. 25, 1921.

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WARP STOP MOTION FOR LOOMS.

APPLICATION FILED IuLY 16.1921.

1,394,970. Patented Oct. 25, 1921.

3 SHEETS-SHEET 3.

@am @WIM y czoney Z5/venan WAR? STOP-MOTION FOR LOOMS.

To all fw wmt may concern:

Be it known that I, ARTHUR S. CowAN, a

citizen of the United States,` residing at Hyde Park, Boston, in the county of Suffolk, State of Massachusetts, have invented a certain new and useful Improvement in Warp Stop-Motions for Looms, of which the following is a specification, reference being had therein to the accompanying drawings.

My invention has relation to warp-stop motions for looms, and in particular to the supports, bridges, or braces which are used at intermediate points stop motions, more especially in the case of looms of considerable width, to stay the transversely-extendmg' guide-bars, retaining rods wires or bars, and back-stop bars, restrain them from excessive vibration, and keep them parallel with one another and uniformly spaced lapart across the width of a loom.

It has relation, also, to the means of securing the said supports, bridges, or braces in their position of use.

Bridges or braces of the general class referred to are mounted in usual practice upon the transversel -extending elements of warp-stop motions, usually upon the guide-bars for the dro -wires In some instances, they=are mounted fixedly without capacity for adjustment transversely of the loom. The want of such capacity gives rise to inconvenience and entails expenditure of labor and time, when it becomes necessary to remedy the faulty conditions which exist in case the warp-threads immediately adjacent the bridge or brace happen to be deflected laterally thereby at one side thereof, instead of extending atboth sides thereof without lateral deviation, from' the loom whip-roll to the eyes Vofthe loom-harness and the openings between the dents of the reed on the lay. In some cases bridges .or braces have been mounted with capacity for adjustment transversely of a loom, but with the provisions for attachment and adjustment located below the level of the warpthreads, and at or near the middle of the width of the series of warp-threads, so that after the warp-threads are in place in the loom the said provisions are hidden by the warp-threads and can be reached only by Speccation of Letters Patent.

in the length of warp- I Patented Oct. 25, 1921. 1921. Serial No. 485,179.

spreading the latter apart and passing ones hand and the necessary wrench or other tool downward between the threads. With arrangements such as last mentioned, shifting of the bridge or brace can be effected only with considerable inconvenience and wvith likelihood of breakage and soiling of the warps. l

The invention consists in an improved combination bridge or brace, of novel construction, for the transversely-extending elements of a warp-stop motion, including' the back-stop bars. Also, in improved means of securing a bridge or brace in the desired position in a loom and enabling it to be adj usted vtransversely of the latter.

The said combination bridge or brace comprises, in addition to an upper portion or bridge proper, a lower section or yoke-member, connected with the lower portion of the bridge proper, formed with recessed seats for the back-stop bars, and preferably constructed to form an intermediate support or guide for the horizontally reciprocating feelerrod or rods.

The improved securing and positioning means comprises a rod secured to the bridge or brace, extending transversely of a loom parallel with the guide-bars, etc., and a bearing or guide occupying a fixed position, which receives within it the said transversely extending' rod, and holds the latter and the lbridge or brace in place with capacity for transverse adjustment. In the more complete embodiment of the features of the invention the holding means and the outer end-portion of the rod are located at one end ofA the warp-stop motion, at a point where they are accessible from beyond the warp-threads'without necessity for parting the warp-.threads and passing ones hand or a'tool through between them. This enables adjustments to be made conveniently, and without breakage or soiling of the warpthreads. Preferably, the said holding means is located outside of the series of warpthreads, clear of the latter.

Illustrative embodiments of my invention are shown in the accompanying drawings, in which z- Figure l is a side view of a portion of a four-bank warp-stop motion, showing an adjustable bridge or brace of novel construction, and means ment.

Fig. 8 shows a construction which enables the yposition of an intermediate bridge or brace to be adjusted from either side of a loom.

Fig. 9 shows one of the friction clamps of Fig. 3.

Fig. 1() shows a construction in which the adjusting-rod is screw-threaded and is fitted to a screw-threaded bearing on an endplate of the warp-stop motion mechanism.

Having reference to the drawings,-

Aside from the features involved in the invention, the warp-Stop motion illustrated in the drawings is of old design. By way of briefly describing the same, it may be stated that in practice the end-plates 1 at the opposite ends of the mechanism are mounted upon the loom-frame and support the ends of the transverse bars 2, 2a, and tie-rod 2b, which serve as guides for the drop-wires 3, 3, the bars 2 and tie-rod 2b also serving as rests for the warp-threads fw, Fig. 1, occupying the slots in the lower portions of the drop-wires. The said endplates also support the ends of the wires 4l, 4, extending lengthwise of the respective banlrs of drop-wires, through the slots in the upper portions of the drop-wires, an serving to limit the descent of the drop-wires when the latter are permitted 'to drop in consequence of the breaking or slackening of the warp-threads. In this instance, for the reception of the said ends of wires 4, Ll, open-topped slots 1a, 1a, are made in the upper portions of the end-plates, the lower ends Vof these slots constituting seats rin which such wire-ends rest normally. Secondary seats 1", 1b, at higher points at the sides of slots 1a, 1, are designed to receive the Vends of the wires when the latter have been raisedso as to lift their drop-wires en 'masse clear of the path of the feeler-rods 6, 6. In bearings l1" in connection with the two endlates is mounted the oscillating rockshaft 8 having fixed upon each of its ends an arm 8- having a slot 8b receiving a stud or pin 7a projecting from a bar 7 which is engaged with the corresponding ends of the feeler-rods 6, 6. The end-portions of the feeler-rods slide in a horizontalr slot 1C 1n each of the end-plates, as the feeler-rods are reciprocated back and forth below the lower ends of the drop-wires through the oscillating movement of the roclrsliaft 8, the outer portion of which is supported by a supplemental bearing 3c provided in an arm 8d attached to a stud 3e screwedrinto a nipple 1l projecting from the adjacent end-plate. The said rockshaft 3 is given a constant rocking motion through connections (not shown) with some convenient movingk part of the loom. The back-stop bars 21, 21, 21, are supported in place below the level of the path in which the feeler-rods reciprocate, by having their ends entered into notches inthe lower edges of the end-plates, and held in such notches by `means of plates 22, 22, Figs. 1 and 3, fastened to such edges by means of bolts 23, 23. The general construction and mode of operation of the parts thus far referred to are well-known. The features of the invention, for convenience, are shown applied in connection therewith, but are equally applicable in connection with warp stop-motion mechanisms differing in general construction. Y

The novel bridge or brace shown in the drawings comprises a main section or body 5 and a lower section 9. The main section or body 5 is shown separately vin Fig. 5. The general construction thereof may vary in practice. In this instance, it has in its lower edge open-bottomed slots-5b and 5c to fit the guide-bars 2 and 2a, and it has also holes 5d, 5e, to receive the tie-rod 2b and the shaft 8. In this instance, also, the top of the section 5 is formed with opentopped slots 5a and elevated seats 5b, corresponding with the slotsrla and seats 1b of the end-plates, and designedl to receive and support intermediate portions of wires 4, The features of the main section, thus far mentioned, are not material to the invention. The lower section 9 is shown separately in Fig. 6.V It is in the form of a bar having in its upper edge open-topped slots' 95,921, to receive intermediate portions of the back stop-bars, the bottoms of such slots constituting seats for such portions of the said bars. VHoles 9", 9b, are made in the opposite end-portions of section 9, and likeV holes 5h, 5h, aremade in downward extending lugs or projections 5g, 5g, at opposite ends of themainr section or body 5. After the two sections have been fitted to the transversely-extending elements of the warp-stoptensions of the upper section `or `bridge proper.

lThe top surfaces of the portions of section 9 which intervene between the open-topped slots9a, 9a., back-stops-bars 21, 21, when the latter are in place within such slots. Consequently, the said top surfaces and the said tops constitute a race or guideway on which the intermediate portions of the feeler-rods 6, '6, slide or roll in the reciprocating movements y of the feeler-rods.

y means of securing a bridge or brace in the desired position transversely of a loom, comprises a transversely-extending rod 11 and a bearing or guide by which such rod is held. The rod is connected with the bridge or brace by any suitable means, as y forming a hole 5f, Fig. 5, in the bridge or brace, inserting the rod into such hole, and making the rod fast With the bridge or brace by means of collars or nuts 11a, igs. 1, 2 and 4, upon such end at the opposite sides of the bridge or brace. In the case of plain collars, they will be secured in place upon the rod by suitable clamping screws. In case nuts are employed, the rod will be screw-threaded to receive them, as in Figs. 1 and 2. The rod 11 extends transversely of the loom, parallel to the transverselyextending elements of the warp-stop motion, and at a level below the warp-rests constitutedby the tops of the guide-bars 2, 2, and tie-rod 2b. I combine the rod with the bearing or guide in such manner that the rod may be adjusted widthwise of the loom in order that the bridge-or brace may be shifted in such direction.

The provisions for holding the rod in p0- sition endwise, and for enabling it to be adjusted endwise, may vary in practice, and the location of the bearing or guide and of the said provisions widthwise of a loom may be varied. Most advantageously the said parts are located and arranged so that the provisions for securing andv adjusting the rod, and thereby positioning the bridge or brace, are accessible from a point at one side of the series of warp-threads, so as to enable the parts to be reached and manipulated without it being necessary to pass ones hand or a tool down through the warp-threads. Figs. 1, 2 and 3 show a convenient type of construction comprising a bearing or guide constituted by a lug 12 formed upon one edge of an end-plate 1, bored to accommodate the rod 11, 'which passes therethrough, and a clamping thumb-screw 13, applied to a threaded hole that is tapped through the said lug at right angles to the bore therethrough, and engaging by its inner end aga-inst the rod to clamp the latter so as to hold it from endwise movement. The rod is of a length suitable to extend through the bearing or guide and project outward beyond the latter. With this construction, an adjustment of the bridge or brace is made by loosening the thumb-screw 13, taking hold of the outer end-portion of the rod, and

are flush with the tops of the pushing or pulling the rod endwise to give the bridge or brace the desired position widthwise of the loom. The thumb-screw is then tightened up to clamp the rod and retain the bridge or brace in the position which has been given to it.

In the case of the modified means of adjustment that is shown by Fig. 7, the outer portion of the rod 11 is screw-threaded and nuts 14, 14, are mounted thereon at opposite sides of the bearing or guide 12. These nuts hold the rod and bridge or brace fixed in the desired position of adjust-nient, and may be utilized in obvious manner in effecting adjustment.

The rod may be extended from one end of the Warp stop-motion mechanism to the other thereof, as in the case of rod 11b in Fig. 8, in which case it usually will be mounted in bearings or guides 12a, 12a, upon the opposite end-plates 1, 1. In such case it may be manipulated from either side of the loom by taking hold of the corresponding end thereof. Clamping means on the order of those shown in Figs. 1, 2, and 7, may be employed, but I have shown in Fig. 9 a friction clamp made by providing one of the bearings or guides, l2, with a friction block, 12b, acted upon by a screw, 13, and arranged to bear against the rod. The friction due to the pressure and contact of the friction block will hold the rod and bridge or brace in the position in which they may have been set, but the bridge or brace may be adjusted as required by causing the rod to slide through the friction clamp.

In the case of the construction shown in Fig. 10, the rod 11 is screw-threaded in the portion 11d thereof which passes through the bearing or guide 12d, which latter` is internally threaded so as to constitute a fixed nut, the inner end of the rod being engaged with the bridge or brace in a wellknown manner permitting the rod to turn relative to the bridge or brace While compelling the bridge or brace to move transversely in unison with the rod. A handwheel 11e upon the rod facilitates the operation of turning the same, and through such turning of the rod and the consequent endwise movement thereof as it is screwed inwardly or outwardly through the bearing or guide 121 the bridge or brace is adjusted transversely.

Vhat is claimed as the invention is,`

1. In a .warp-stop-motion mechanism for looms, the combination with one or more reciprocating feeler-rods, the back-stop-bars, and transversely-extending elements above said bars, of an intermediate bridge or brace comprising an upper section engaging and supported by the latter elements, and a lower section supported by said upper section, having recessed seats receiving the bars, of an intermediate combination bridge or brace comprising an upper section engaging and supported by the latter elements, and a lower section supported by said upper section, comprising a tie-bar attached by its ends to the upper section and having recessed seats receiving and supporting the back-stop-bars.

3. In a warp-stop-motion for looms, the combination with transversely-extending elements thereof, and a bridge or brace forV such elements, of securing and adjusting means comprising a transversely-extending rod connected with the bridge or brace and by movement 'of which the bridge or brace is adjusted transversely, and a bearing or guide which holds said rod.

4f. In a warp-stopsmotion for looms, the combination with transversely-extending elements thereof, and a bridge or brace for such elements, of securing and adjusting means comprising a transversely-extending rod connected with the bridge or brace and by movement of which the bridge or brace is adjusted transversely, and a clamp which engages said rod to thereby hold the bridge or brace in place.

5. In a warp-stop-motion for looms, the combination with transversely-extending elements thereof, of an intermediate bridge orbrace for the said elements, and means for adjusting and fixing the position of said bridge or brace from a point at one side of the warp-threads.

6. In a warp-stop-motion for looms, the combination with transversely-extending elements thereof, of an intermediate bridge or brace for the said elements, a transverse rod secured to said bridge or brace and eX- tending outwardly therefrom beyond the warp-threads, and means at one side of the warp-threads for fiXedly holding said transverse rod, and thus the saidy adjustable bridge or brace, in the desired position.

7. Inl a warp-stop-motion for looms, the combination with transversely-extending elements thereof, of an intermediate bridge or brace for such elements, and an adjustment rod for such bridge or brace extending outward to a' position accessible from beyond the edge of the warp. A

8. In a warp-stop-motionfor looms, the combination with transversely-extending elements thereof, of an intermediate bridge or brace for such elements, and an adjustment rod for such bridge or brace, having an end thereof located outside beyond the edge of the warp. Y

9. In a warp-stop-motion for looms, the combination with `transversely-extending elements thereof, and an end-plate thereof provided with a rod-bearing or guide, of an,

intermediate bridge or brace for such elements,

ELLEN O. SPRING.

and an'adjustment rod connectedy with such bridge or brace and extendingV 

